<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addRoles">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="rolesList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRightById(scope.row, item1.id)"
                  >{{ item1.authName }}</el-tag
                >
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过 for 循环 嵌套渲染二级权限 -->
                <el-row
                  :class="['bdtop', i2 === 0 ? 'bdtop' : '', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                    >
                      {{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!--<pre>
              {{scope.row}}
            </pre>-->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column label="#" type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <!-- 编辑按钮 -->
            <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditRolesDialog(scope.row.id)">编辑</el-button>
            <!-- 删除按钮 -->
            <el-button type="danger" icon="el-icon-delete" size="mini" @click="DeleteRoles(scope.row.id)">删除</el-button>
            <!-- 分配权限按钮 -->
            <el-button
              type="warning"
              icon="el-icon-setting"
              size="mini"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 添加角色区域 -->
    <el-dialog title="添加角色" :visible.sync="addRolesDialogVisible" @close="addRolesClosed">
      <el-form :model="addForm" ref="addFormRef" :rules="addFormRules" >
        <el-form-item label="角色名称"  prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述"  prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addRolesDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRoleForm">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 编辑角色区域 -->
    <el-dialog title="编辑角色" :visible.sync="EditRolesDialogVisible" width="30%">
      <el-form :model="editForm" :rules="editRules" ref="editRolesRef" label-width="100px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="EditRolesDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addEditRolesForm()">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 树形控件 -->
      <el-tree
        :data="rightList"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 所有的角色列表数据
      rolesList: [],
      // 添加角色信息
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      addFormRef: {},
      addFormRules: {
        roleName: [
          { required: true, message: '请输入角色名', trigger: 'blur' },
          { min: 3, max: 10, message: '角色名的长度在3-10个字符之间', trigger: 'blur' }],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' },
          { min: 3, max: 10, message: '角色描述的长度在3-10个字符之间', trigger: 'blur' }]
      },
      // 编辑角色
      EditRolesDialogVisible: false,
      editForm: {
        roleName: '',
        roleDesc: ''
      },
      editRolesRef: {},
      editRules: {
        roleName: [
          { required: true, message: '请输入角色名', trigger: 'blur' },
          { min: 3, max: 10, message: '角色名的长度在3-10个字符之间', trigger: 'blur' }],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' },
          { min: 3, max: 10, message: '角色描述的长度在3-10个字符之间', trigger: 'blur' }]
      },
      // 控制添加角色对话框的显示与隐藏
      addRolesDialogVisible: false,
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 所有数据的权限默认为空
      rightList: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点id值
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: []
    }
  },
  created () {
    // 获取所有的角色
    this.getRolesList()
  },
  methods: {
    // 获取所有角色列表
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败!')
      }
      this.rolesList = res.data
      console.log(this.roleList)
    },
    // 控制添加角色对话框的显示
    addRoles () {
      this.addRolesDialogVisible = true
    },
    // 监听添加角色对话框的关闭事件,重置表单
    addRolesClosed () {
      this.$refs.addFormRef.resetFields()
    },
    // 点击确定提交表单信息
    addRoleForm () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        // 可以发起添加用户的网络请求
        const { data: res } = await this.$http.post('roles', this.addForm)
        console.log(res)
        if (res.meta.status !== 201) {
          this.$message.error('添加用户失败')
        }
        this.$message.success('添加用户成功')
        this.getRolesList()
        this.addRolesDialogVisible = false
      })
    },
    // 控制编辑角色对话框的显示与隐藏
    async showEditRolesDialog (roleId) {
      console.log(roleId)
      const { data: res } = await this.$http.get('roles/' + roleId)
      console.log(res)
      if (res.meta.status !== 200) {
        this.$message.error('获取角色失败!')
      }
      this.$message.success('获取角色成功!')
      this.editForm = res.data
      this.EditRolesDialogVisible = true
    },
    // 点击确定,提交修改信息
    addEditRolesForm (roleId) {
      this.$refs.editRolesRef.validate(async valid => {
        if (!valid) return true
        // 可以发起用户请求
        const { data: res } = await this.$http.put('roles/' + this.editForm.roleId, {
          roleName: this.editForm.roleName,
          roleDesc: this.editForm.roleDesc
        })
        console.log(res)
        if (res.status !== 200) {
          this.$message.error('修改用户失败!')
        }
        this.$message.success('修改用户成功!')
        this.getRolesList()
        this.EditRolesDialogVisible = false
      })
    },
    // 删除角色
    async DeleteRoles (roleId) {
      const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('用户已取消删除')
      }
      // console.log(roleId)
      const { data: res } = await this.$http.delete('roles/' + roleId)
      // console.log(res)
      if (res.meta.status !== 200) {
        return this.$message.error('角色删除失败!')
      }
      this.$message.success('角色删除成功!')
      this.getRolesList()
    },
    // 根据对应的Id删除对应的权限
    async removeRightById (role, rightId) {
      // 弹框提示用户是否删除
      const confirmResult = await this.$confirm(
        '此操作将永久删除该用户, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)
      // 如果用户确认删除则返回值为字符串confirm
      // 如果用户取消了删除，则返回值为字符串 cancel
      // console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除!')
      }
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败！')
      }
      this.$message.success('删除权限成功!')
      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      // 获取全部权限数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败')
      }
      // 获取到的权限数据保存到data中
      this.rightList = res.data
      console.log(this.rightList)
      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归的形势获取角色下所有三级权限的id,并保存到defKeys数组中
    getLeafKeys (node, arr) {
      if (!node.children) {
        // 如果当前node节点不包含children 属性，则是三级节点
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed () {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      )
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }
      this.$message.success('分配权限成功!')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style Lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
